G4VPartonStringModel Class Reference

#include <G4VPartonStringModel.hh>

Inheritance diagram for G4VPartonStringModel:

Collaboration diagram for G4VPartonStringModel:

Public Member Functions
	G4VPartonStringModel (const G4String &modelName="Parton String Model")
virtual	~G4VPartonStringModel ()
void	SetFragmentationModel (G4VStringFragmentation *aModel)
G4KineticTrackVector *	Scatter (const G4Nucleus &theNucleus, const G4DynamicParticle &thePrimary)
virtual G4V3DNucleus *	GetWoundedNucleus () const =0
virtual void	ModelDescription (std::ostream &outFile) const
virtual G4V3DNucleus *	GetProjectileNucleus () const
Public Member Functions inherited from G4VHighEnergyGenerator
	G4VHighEnergyGenerator (const G4String &modelName="High Energy Generator")
virtual	~G4VHighEnergyGenerator ()
std::pair< G4double, G4double >	GetEnergyMomentumCheckLevels () const
void	SetEnergyMomentumCheckLevels (G4double relativeLevel, G4double AbsoluteLevel)
virtual G4String	GetModelName () const

Protected Member Functions
virtual void	Init (const G4Nucleus &theNucleus, const G4DynamicParticle &thePrimary)=0
virtual G4ExcitedStringVector *	GetStrings ()=0
void	SetThisPointer (G4VPartonStringModel *aPointer)
G4bool	EnergyAndMomentumCorrector (G4KineticTrackVector *Output, G4LorentzVector &TotalCollisionMomentum)

Private Member Functions
	G4VPartonStringModel (const G4VPartonStringModel &right)
const G4VPartonStringModel &	operator= (const G4VPartonStringModel &right)
int	operator== (const G4VPartonStringModel &right) const
int	operator!= (const G4VPartonStringModel &right) const

Private Attributes
G4VStringFragmentation *	stringFragmentationModel
G4VPartonStringModel *	theThis

Detailed Description

Definition at line 51 of file G4VPartonStringModel.hh.

Constructor & Destructor Documentation

G4VPartonStringModel() [1/2]

G4VPartonStringModel::G4VPartonStringModel

(

const G4String &

modelName = "Parton String Model"

)

Definition at line 47 of file G4VPartonStringModel.cc.

    : G4VHighEnergyGenerator(modelName),
      stringFragmentationModel(0),
      theThis(0)
{
//  Make shure Shotrylived partyicles are constructed.
    G4ShortLivedConstructor ShortLived;
    ShortLived.ConstructParticle();
}

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~G4VPartonStringModel()

G4VPartonStringModel::~G4VPartonStringModel ( )

virtual

Definition at line 57 of file G4VPartonStringModel.cc.

{
}

G4VPartonStringModel() [2/2]

G4VPartonStringModel::G4VPartonStringModel ( const G4VPartonStringModel &  right )

private

Member Function Documentation

EnergyAndMomentumCorrector()

G4bool G4VPartonStringModel::EnergyAndMomentumCorrector ( G4KineticTrackVector *  Output, G4LorentzVector &  TotalCollisionMomentum  )

protected

GetProjectileNucleus()

G4V3DNucleus * G4VPartonStringModel::GetProjectileNucleus ( ) const

virtual

Reimplemented from G4VHighEnergyGenerator.

Reimplemented in G4FTFModel, G4QGSModel< ParticipantType >, G4QGSModel< G4GammaParticipants >, and G4QGSModel< G4QGSParticipants >.

Definition at line 301 of file G4VPartonStringModel.cc.

{ return 0;}

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GetStrings()

virtual G4ExcitedStringVector* G4VPartonStringModel::GetStrings ( )

protectedpure virtual

Implemented in G4FTFModel, G4QGSModel< ParticipantType >, G4QGSModel< G4GammaParticipants >, and G4QGSModel< G4QGSParticipants >.

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GetWoundedNucleus()

virtual G4V3DNucleus* G4VPartonStringModel::GetWoundedNucleus ( ) const

pure virtual

Implements G4VHighEnergyGenerator.

Implemented in G4FTFModel, G4QGSModel< ParticipantType >, G4QGSModel< G4GammaParticipants >, and G4QGSModel< G4QGSParticipants >.

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Init()

virtual void G4VPartonStringModel::Init ( const G4Nucleus &  theNucleus, const G4DynamicParticle &  thePrimary  )

protectedpure virtual

Implemented in G4FTFModel, G4QGSModel< ParticipantType >, G4QGSModel< G4GammaParticipants >, and G4QGSModel< G4QGSParticipants >.

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ModelDescription()

void G4VPartonStringModel::ModelDescription ( std::ostream &  outFile ) const

virtual

Reimplemented from G4VHighEnergyGenerator.

Reimplemented in G4FTFModel, G4QGSModel< ParticipantType >, G4QGSModel< G4GammaParticipants >, and G4QGSModel< G4QGSParticipants >.

Definition at line 296 of file G4VPartonStringModel.cc.

{
    outFile << GetModelName() << " has no description yet.\n";
}

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operator!=()

int G4VPartonStringModel::operator!= ( const G4VPartonStringModel &  right ) const

private

operator=()

const G4VPartonStringModel& G4VPartonStringModel::operator= ( const G4VPartonStringModel &  right )

private

operator==()

int G4VPartonStringModel::operator== ( const G4VPartonStringModel &  right ) const

private

Scatter()

G4KineticTrackVector * G4VPartonStringModel::Scatter ( const G4Nucleus &  theNucleus, const G4DynamicParticle &  thePrimary  )

virtual

Implements G4VHighEnergyGenerator.

Definition at line 61 of file G4VPartonStringModel.cc.

{  
  G4ExcitedStringVector * strings = NULL;

  G4DynamicParticle thePrimary=aPrimary;

#ifdef debug_PartonStringModel
  G4cout<<G4endl;
  G4cout<<"-----------------------Parton-String model is runnung ------------"<<G4endl;
  G4cout<<"Projectile Name Mass "<<thePrimary.GetDefinition()->GetParticleName()<<" "
                                 <<thePrimary.GetMass()<<G4endl;
  G4cout<<"           Momentum  "<<thePrimary.Get4Momentum()<<G4endl;
  G4cout<<"Target nucleus   A Z "<<theNucleus.GetA_asInt()<<" "
                                 <<theNucleus.GetZ_asInt()<<G4endl<<G4endl; 
  G4int Bsum=thePrimary.GetDefinition()->GetBaryonNumber() + theNucleus.GetA_asInt();
  G4int Qsum=thePrimary.GetDefinition()->GetPDGCharge() + theNucleus.GetZ_asInt();
  G4cout<<"Initial baryon number "<<Bsum<<G4endl;
  G4cout<<"Initial charge        "<<Qsum<<G4endl;

  Bsum -= theNucleus.GetA_asInt();  Qsum -= theNucleus.GetZ_asInt();
  if(theThis->GetProjectileNucleus()) {
    Bsum -= thePrimary.GetDefinition()->GetBaryonNumber();
    Qsum -= thePrimary.GetDefinition()->GetPDGCharge();
  }
#endif

  G4LorentzRotation toZ;
  G4LorentzVector Ptmp=thePrimary.Get4Momentum();
  toZ.rotateZ(-1*Ptmp.phi());
  toZ.rotateY(-1*Ptmp.theta());
  thePrimary.Set4Momentum(toZ*Ptmp);
  G4LorentzRotation toLab(toZ.inverse());

  G4int attempts = 0, maxAttempts=20;
  while ( strings  == NULL )  /* Loop checking, 07.08.2015, A.Ribon */
  {
    if (attempts++ > maxAttempts ) 
    {
        throw G4HadronicException(__FILE__, __LINE__, 
            "G4VPartonStringModel::Scatter(): fails to generate strings");
    }
    theThis->Init(theNucleus,thePrimary);

    strings = GetStrings();
  }
  
  G4double stringEnergy(0);
  G4LorentzVector SumStringMom(0.,0.,0.,0.);

#ifdef debug_PartonStringModel
  G4cout<<"Parton-String model: Number of produced strings "<<strings->size()<<G4endl;
#endif

  for ( unsigned int astring=0; astring < strings->size(); astring++)
  {
//    rotate string to lab frame, models have it aligned to z
    if((*strings)[astring]->IsExcited())
    {
     stringEnergy += (*strings)[astring]->GetLeftParton()->Get4Momentum().t();
     stringEnergy += (*strings)[astring]->GetRightParton()->Get4Momentum().t();
     (*strings)[astring]->LorentzRotate(toLab);
     SumStringMom+=(*strings)[astring]->Get4Momentum();
#ifdef debug_PartonStringModel
G4cout<<"String No "<<astring+1<<" "<<(*strings)[astring]->Get4Momentum()<<" "
                                    <<(*strings)[astring]->Get4Momentum().mag()
     <<" Partons   "<<(*strings)[astring]->GetLeftParton()->GetDefinition()->GetPDGEncoding()
     <<"          "<<(*strings)[astring]->GetRightParton()->GetDefinition()->GetPDGEncoding()<<G4endl;
#endif
    }
    else
    {
     stringEnergy += (*strings)[astring]->GetKineticTrack()->Get4Momentum().t();
     (*strings)[astring]->LorentzRotate(toLab);
     SumStringMom+=(*strings)[astring]->GetKineticTrack()->Get4Momentum();
#ifdef debug_PartonStringModel
     G4cout<<"A track No "<<astring+1<<" "
           <<(*strings)[astring]->GetKineticTrack()->Get4Momentum()<<" "
           <<(*strings)[astring]->GetKineticTrack()->Get4Momentum().mag()<<" "
           <<(*strings)[astring]->GetKineticTrack()->GetDefinition()->GetParticleName()<<G4endl;
#endif
    }
  }
#ifdef debug_PartonStringModel
  G4cout<<G4endl<<"SumString4Mom "<<SumStringMom<<G4endl;

  G4LorentzVector TargetResidual4Momentum(0.,0.,0.,0.);
  G4LorentzVector ProjectileResidual4Momentum(0.,0.,0.,0.);
  G4int hitsT(0), charged_hitsT(0);
  G4int hitsP(0), charged_hitsP(0);
  G4double ExcitationEt(0.), ExcitationEp(0.);
#endif

  G4V3DNucleus * ProjResNucleus=theThis->GetProjectileNucleus();
  G4Nucleon * theNuclNucleon(0);

  if(ProjResNucleus != 0)
  {
    theNuclNucleon = ProjResNucleus->StartLoop() ?
                     ProjResNucleus->GetNextNucleon() : NULL;
    while( theNuclNucleon )  /* Loop checking, 07.08.2015, A.Ribon */
    {
     if(theNuclNucleon->AreYouHit())
     {
      G4LorentzVector tmp=toLab*theNuclNucleon->Get4Momentum();
      #ifdef debug_PartonStringModel
         ProjectileResidual4Momentum += tmp;
         hitsP++;
         if ( theNuclNucleon->GetDefinition() == G4Proton::Proton() )  ++charged_hitsP;
         ExcitationEp +=theNuclNucleon->GetBindingEnergy();
      #endif
      theNuclNucleon->SetMomentum(tmp);
     }
     theNuclNucleon = ProjResNucleus->GetNextNucleon();
    }
#ifdef debug_PartonStringModel
    G4cout<<"Projectile residual A, Z and E* "
          <<thePrimary.GetDefinition()->GetBaryonNumber() - hitsP<<" "
          <<thePrimary.GetDefinition()->GetPDGCharge()    - charged_hitsP<<" "
          <<ExcitationEp<<G4endl;
    G4cout<<"Projectile residual 4 momentum  "<<ProjectileResidual4Momentum<<G4endl;
#endif
  }

  G4V3DNucleus * ResNucleus=theThis->GetWoundedNucleus(); 

   // loop over wounded nucleus
  theNuclNucleon = ResNucleus->StartLoop() ?
                   ResNucleus->GetNextNucleon() : NULL;
  while( theNuclNucleon )  /* Loop checking, 07.08.2015, A.Ribon */
  {
     if(theNuclNucleon->AreYouHit())
     {
      G4LorentzVector tmp=toLab*theNuclNucleon->Get4Momentum();
      #ifdef debug_PartonStringModel
         TargetResidual4Momentum += tmp;
         hitsT++;
         if ( theNuclNucleon->GetDefinition() == G4Proton::Proton() )  ++charged_hitsT;
         ExcitationEt +=theNuclNucleon->GetBindingEnergy();
      #endif
      theNuclNucleon->SetMomentum(tmp);
     }
     theNuclNucleon = ResNucleus->GetNextNucleon();
  }
#ifdef debug_PartonStringModel
   G4cout<<"Target residual A, Z and E* "
         <<theNucleus.GetA_asInt() - hitsT<<" "
         <<theNucleus.GetZ_asInt() - charged_hitsT<<" "
         <<ExcitationEt<<G4endl;
   G4cout<<"Target residual 4 momentum "<<TargetResidual4Momentum<<G4endl;

   Bsum+=(        hitsT +         hitsP);
   Qsum+=(charged_hitsT + charged_hitsP);

   G4cout<<"Hitted # of nucleons of projectile and target "<<hitsP<<" "<<hitsT<<G4endl;
   G4cout<<"Hitted # of protons of projectile and target  "
         <<charged_hitsP<<" "<<charged_hitsT<<G4endl<<G4endl;
G4cout<<"Bsum Qsum "<<Bsum<<" "<<Qsum<<G4endl;
#endif

//=========================================================================================
//  Fragment strings

  G4KineticTrackVector * theResult = 0;
  G4double InvMass=SumStringMom.mag();
  G4double SumMass(0.); 
  attempts = 0; 
  maxAttempts=100;

  #ifdef debug_PartonStringModel
     G4LorentzVector SumPsecondr(0.,0.,0.,0.);
     G4int QsumSec(0), BsumSec(0);
  #endif

  do 
  {     
   attempts++;   
   if(theResult != 0)
   {
    std::for_each(theResult->begin(), theResult->end(), DeleteKineticTrack());
    delete theResult;
   }

   theResult = stringFragmentationModel->FragmentStrings(strings);

   if(attempts > maxAttempts ) break;

   #ifdef debug_PartonStringModel
      G4cout<<"Attempt to fragment the strings "<<attempts<<G4endl;
      G4cout<<"Parton-String model: Number of produced particles "<<theResult->size()<<G4endl;
      SumPsecondr = G4LorentzVector(0.,0.,0.,0.);
      QsumSec = 0; BsumSec = 0;
   #endif

   SumMass=0.;

   for ( unsigned int i=0; i < theResult->size(); i++)
   {
    SumMass+=(*theResult)[i]->Get4Momentum().mag();
    #ifdef debug_PartonStringModel
       G4cout<<i<<" : "<<(*theResult)[i]->GetDefinition()->GetParticleName()<<" "
                       <<(*theResult)[i]->Get4Momentum()<<" "
                       <<(*theResult)[i]->Get4Momentum().mag()<<" "
                       <<(*theResult)[i]->GetDefinition()->GetPDGMass()<<G4endl;
       SumPsecondr+=(*theResult)[i]->Get4Momentum();
       BsumSec += (*theResult)[i]->GetDefinition()->GetBaryonNumber();
       QsumSec += (*theResult)[i]->GetDefinition()->GetPDGCharge();
    #endif
   }

#ifdef debug_PartonStringModel
   if(Qsum != QsumSec) {
     G4cout<<"Charge is not conserved!!! ----"<<G4endl; 
     G4cout<<" Qsum != QsumSec "<<Qsum<<" "<<QsumSec<<G4endl;
   }
   if(Bsum != BsumSec) {
     G4cout<<"Baryon number is not conserved!!!"<<G4endl;
     G4cout<<" Bsum != BsumSec "<<Bsum<<" "<<BsumSec<<G4endl;
   }
#endif
  } while(SumMass > InvMass);  /* Loop checking, 07.08.2015, A.Ribon */

  std::for_each(strings->begin(), strings->end(), DeleteString() );
  delete strings;

#ifdef debug_PartonStringModel
  G4cout<<G4endl<<"Baryon number balance "<<Bsum-BsumSec<<G4endl;
  G4cout        <<"Charge balance        "<<Qsum-QsumSec<<G4endl;
  G4cout        <<"4 momentum balance    "<<SumStringMom-SumPsecondr<<G4endl; 
  G4cout<<"End of string model work ------------"<<G4endl<<G4endl;
#endif

  return theResult;
}

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SetFragmentationModel()

void G4VPartonStringModel::SetFragmentationModel ( G4VStringFragmentation *  aModel )

inline

Definition at line 85 of file G4VPartonStringModel.hh.

{
  stringFragmentationModel = aModel;
}

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SetThisPointer()

void G4VPartonStringModel::SetThisPointer ( G4VPartonStringModel *  aPointer )

inlineprotected

Definition at line 91 of file G4VPartonStringModel.hh.

{
    theThis=aPointer;
}

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Member Data Documentation

stringFragmentationModel

G4VStringFragmentation* G4VPartonStringModel::stringFragmentationModel

private

Definition at line 80 of file G4VPartonStringModel.hh.

theThis

G4VPartonStringModel* G4VPartonStringModel::theThis

private

Definition at line 81 of file G4VPartonStringModel.hh.

---

The documentation for this class was generated from the following files:

• G4VPartonStringModel.hh
• G4VPartonStringModel.cc